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Related Experiment Videos

Streptomycin pharmacokinetics in malnutrition

J S Prasad, K Krishnaswamy

    Chemotherapy
    |January 1, 1978
    PubMed
    Summary

    Undernourished individuals exhibit similar streptomycin pharmacokinetics as well-nourished individuals. This is likely due to streptomycin binding to globulins, not just albumin, maintaining drug levels despite lower albumin.

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    Area of Science:

    • Pharmacology
    • Clinical Nutrition
    • Drug Metabolism

    Background:

    • Nutritional status can significantly impact drug pharmacokinetics.
    • Streptomycin is an aminoglycoside antibiotic commonly used for bacterial infections.
    • Plasma protein binding is a crucial factor influencing drug distribution and elimination.

    Purpose of the Study:

    • To investigate the pharmacokinetic parameters of streptomycin in undernourished versus well-nourished individuals.
    • To assess the influence of nutritional status on streptomycin plasma concentration, half-life, excretion, and protein binding.
    • To determine if low serum albumin in undernourished individuals affects streptomycin pharmacokinetics.

    Main Methods:

    • Comparison of pharmacokinetic parameters (plasma concentration, half-life, urinary excretion) between undernourished and well-nourished groups.
    • In vitro and in vivo assessment of streptomycin binding to plasma proteins.
    • Measurement of serum albumin levels in both study groups.

    Main Results:

    • No significant differences were observed in streptomycin pharmacokinetic parameters between undernourished and well-nourished subjects.
    • Despite lower mean albumin levels in undernourished individuals, their streptomycin protein binding remained comparable.
    • Streptomycin exhibits binding to globulins in addition to albumin, potentially explaining the unaltered binding.

    Conclusions:

    • Undernutrition does not appear to alter the pharmacokinetics of streptomycin.
    • The binding of streptomycin to globulins, alongside albumin, may compensate for reduced albumin levels in undernourished individuals.
    • Clinical management of streptomycin therapy may not require dose adjustments based solely on nutritional status.

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